SCH even better!

[Sapphic]

Given that the Black Mage in the example had a whopping 9k+ hp at level 60, it's probably safe to assume that you'll never have a moment where it exceeds Stoneskin in normal use.

Adlo is better than SS in normal use. Also Adlo gains the benefit from buffs that increase healing potency and thus the shield due to the strength of the shield being based on the amount healed. Whereas Stoneskin will always be 18% of the targets HP.

For ease of calculation we will say target has 10k HP. Stoneskin will shield for 1800. Adlo at the present time with decent gear heals for around 1200. With HW that figure is going to increase for effective healing. So if we base the increase of potency around the same percentile increase as the HP, which for the BLM at near 10k is about 30%. So you are looking at about 1600 Adlos non crit.

So 1600 heal, 1600 effective heal (the shield) 3200. Whereas Stoneskin is only an effective heal of 1800.

Stoneskin is only more effective than Adlo when the target has full HP or lost less than around 200 HP.